Maybe its zipped? in that case you have to extract the files

I think it's definitely insensitive to say it, but usually when this happens (losing interest in the project or personal issues) the author at least puts out a statement (which is sometimes just: project abandoned). I noticed they did write something on their Tumblr but they said it was going to be just a few months (which it obviously isn't anymore). I also think that if this is really the case of "loosing interest in a project" it's kind of 'weird' from the author not to say anything. Of course we are not entitled to anything since it's free and we are all strangers, but for some people who were invested from the beginning, were on their Tumblr, supported them on Ko-fi, this could be very worrying. As Chiara said before me they also seemed to be very enthusiastic in their posts about the project. I only played it after it was abandoned for months already, so I don't know if they were very active before or/and communicated with their fans. Hopefully they are doing well and just lost interest, but I don't think that's very likely in this situation. Anything can happen tho, just recently a project I followed that was abandoned for 3 years got updated. I do hope the next time I come here the author will at least say if they're okay, I'm sure many people would love to support them if they're in a hard spot.

I just played the demo and i loved it! Im excited for the full game already :) keep up the good work ♡